Pet Health

Why is my dog eating grass and vomiting?

Curious why your dog is eating grass and then vomiting? Discover common reasons, health insights, and tips to ensure your pup's well-being in our latest blog post!
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
A dog sitting on grass, looking uneasy, with a few blades of grass nearby, reflecting concerns about eating grass and vomiting.

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It’s a scenario many dog owners are familiar with: you catch your dog munching on grass, and not long after, they start vomiting. Naturally, this can be concerning, leaving you wondering why your furry friend is engaging in this behavior and whether it’s a sign of a bigger issue. Let’s explore why dogs eat grass and vomit, what it means, and how you can help them feel better.

⚠️ What to Watch For

While grass-eating itself is fairly common among dogs, it’s important to pay attention to the specific details surrounding your dog’s behavior and symptoms. Here are some signs to monitor:

  • If your dog eats grass frequently or obsessively
  • If they vomit regularly after eating grass
  • Signs of lethargy, loss of appetite, or diarrhea
  • Presence of blood in vomit or stool

If your dog shows any of the above symptoms in addition to eating grass, it may indicate an underlying medical issue that requires veterinary attention.

🔍 Possible Causes

Dogs eat grass for a variety of reasons, and not all of them are cause for concern. Below are some of the most common explanations:

  • Upset stomach: Some dogs eat grass as a way to induce vomiting and relieve nausea or gastrointestinal discomfort.
  • Dietary deficiency: Dogs may instinctively seek out grass if they’re lacking certain nutrients, such as fiber.
  • Behavioral reasons: Boredom, anxiety, or simply curiosity can lead dogs to chew on grass.
  • Normal behavior: For some dogs, eating grass is just a normal, non-problematic behavior without any underlying issue.

According to VCA Animal Hospitals, occasional grass-eating is not unusual and is usually harmless unless paired with other symptoms (source).

✅ What You Can Do at Home

If your dog is eating grass and vomiting but otherwise seems healthy, there are some steps you can take at home to address the behavior:

  • Evaluate their diet: Ensure your dog is receiving a well-balanced, high-quality diet that meets their nutritional needs. A lack of fiber or other nutrients might be contributing to their grass-eating habit.
  • Provide mental stimulation: Dogs may eat grass out of boredom. Offering puzzle toys, regular walks, and playtime can reduce this behavior.
  • Keep your yard safe: Make sure the grass your dog has access to isn’t treated with pesticides, herbicides, or fertilizers, which can be toxic.
  • Offer alternatives: If your dog seems to crave greens, consider safe alternatives like steamed green beans or carrots as occasional treats.

It’s also a good idea to monitor your dog after they eat grass. If they vomit but appear normal afterward, it might not be a cause for concern. However, frequent vomiting or other signs of illness warrant further investigation.

💡 When to Call a Vet

While occasional grass-eating and vomiting can be harmless, there are situations where you should consult a veterinarian:

  • Your dog vomits frequently or cannot keep food or water down
  • They exhibit additional symptoms like lethargy, diarrhea, or weight loss
  • You notice blood in their vomit or stool
  • The grass-eating seems obsessive or compulsive

If you’re unsure whether your dog’s behavior is normal or concerning, reaching out to a veterinarian can provide clarity and peace of mind. Early intervention can prevent minor issues from developing into more serious health problems.

FAQs

Q: Is it normal for dogs to eat grass?
A: Yes, occasional grass-eating is normal behavior for many dogs. However, if it’s frequent or paired with symptoms like vomiting or lethargy, it’s worth investigating further.

Q: Should I stop my dog from eating grass?
A: If your dog is eating untreated grass occasionally and is otherwise healthy, you don’t need to stop them. However, if they’re vomiting frequently or eating grass obsessively, consult a vet.

Q: What if my dog vomits after eating grass?
A: Vomiting after eating grass is fairly common and often not a cause for concern. Monitor your dog, and if the vomiting persists or other symptoms appear, contact a vet.

Book a $49 online vet consultation at https://www.dialavet.com for fast, expert advice.

References

While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
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